Chemical Formula LO: Become familiar with the symbols of common elements and understand that elements are made of atoms; Swap your theory book with your.

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Presentation transcript:

Chemical Formula LO: Become familiar with the symbols of common elements and understand that elements are made of atoms; Swap your theory book with your partner Compare and discuss your answers with each other and mark each others homework

Name the position What is the Group and Period of this element? K Cl C Mg Group 7 Group 1 Group 4 Group 2 Period 3 Period 3 Period 2 Period 4 1 2 3 4 5 6 7 H 1 He 2 Li Be B C C N O F Ne 3 Na Mg Mg Al Si P S Cl Cl Ar 4 K K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr 5 Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe 6 Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn 7 Fr Ra Ac Rf Db Sg Bh Hs Mt ? ? ?

Q1. Name a metal in group 1 that is in the same period as Magnesium. Q2. Name a metal in group 2 that in the same period as Lithium. Q3. Name a non-metal in the same group as Nitrogen. Q4. Name a noble gas in the same period as Oxygen. Q5. Name a gas in group 7 that is in the same period as Aluminium.

Chemical formula of elements Each element has a symbol. Some elements exist as particular numbers of atoms bonded together. This fact can be represented in a formula with a number which shows how many atoms. O N H P Formula Molecule Atom O2 N2 H2 P4

Rule 1: When two elements combine the ending is usually ” ……………ide” Rule 1: When two elements combine the ending is usually ” ……………ide”. metal goes first Sodium Chloride Magnesium Oxide Iron Sulph___ Cl Na Mg O Fe S

Rule 2: When three or more different elements combine and one of them is Oxygen, the ending will be “………ate”. metal goes first Copper Sulphate Calcium Carbonate O O Cu S O O O O C Ca O

Rule 3: When two identical elements combine, the name does not change. H2 = Hydrogen F2 = Fluorine N2 = Nitrogen Cl2 = Chlorine O2 = Oxygen H F N Cl O

Name the following compounds/molecule MgCl2 ZnO MgSO4 AgNO3 Na2O KI CuSO4

Draw a line between the compound and its name: Magnesium Carbonate NaCl Magnesium Chloride Iron sulphide Lead nitrate Copper sulphate Sodium Chloride Potassium Iodide Calcium Carbonate Pb(NO3)2 FeS CuSO4 CaCO3 ZnF2 MgCO3 KI Zinc Fluoride MgCl2

1. How many atoms of Hydrogen in one molecule of Methane CH4 ? 2. How many atoms of Nitrogen in one molecule of Lead nitrate Pb(NO3)2 ? 3. Sodium oxide has two atoms of sodium for every atom of oxygen. What is the formula for sodium oxide? 4. Magnesium chloride has one atom of Magnesium for every two atoms of chlorine. What is the formula for Magnesium chloride? 5. How many atoms of Nitrogen in one molecule of Ammonia NH3 ?

KNO3 N2 AgNO3 Carbon dioxide KI CaCO3 Pb Au Cl2 Air CuSO4 K NaCl WORD SPLAT PLENARY KNO3 N2 AgNO3 Carbon dioxide KI CaCO3 Pb Au Cl2 Air CuSO4 K NaCl Magnesium H

Potential starter TASK: Use the periodic table in textbook 1 to find the name or symbol of these elements Element name Symbol Gold Si Ag Starter recap: questions Where can you find every element? Write down 3 chemical symbols of 3 elements of your choice? Write down and chemical formulas you can think of eg. H2O?